I'm having this same stupid problem. I have my Mavericks preferences on "Always" to show scroll bars, but the CC app doesn't show it. I can make it appear by dragging down on the bottom of the window or upward at the top, but then it just fades out again when I stop using it. So wonky!
My normal mouse doesn't have a scroll wheel, and I have no trackpack. I switched to a mouse with a scroll wheel, and then it would scroll down, but not back up!